Tire-setting machine



T. KRAUSKA. TIRE SETTING MACHINE. APPLICATIN FILED APR, 5,1920.

QIQQ, l atnted' May 16, 1922,

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I 5 /2 f f5 T. KRAUSKA. TIRE SETTING MACHINE.

APPLICATION FILED APR- 5,1920.

mente@ May 16, 1922.

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UNITED lSTATES PATENT oFFicE.

TEOMAS KRAUSKA, OF ST. LOUIS, MISSOURI, ASSIGNOR T ALASTIC TIRE CUSHION COMPANY, 0F ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

TIRE-SETTING MACHINE.

Specication of Letters Patent.

Patented May 16, '1922.

Application filed April 5, 1920. Serial No. 371,308.

T oI all whom it may concern.:

Be it known thatI I, TnoMAs humusiiA, a

, citizeno-f the United States, residing at St.

provements in tire setting machines, that is,

vryin part y in section; and Fig. 7 is. an edge view.

machines for attaching resilient tires, whether solid or pneumatic, to-the rims of vehicle wheels. The objects sought are to provide a machine by which a tire may be attached or set, in a minimum amount of time, one which is simple in construction, reliable, one likewise capable off releasing the tire from the rim when the occasion arises to remove the tire, and one possessing further and other advantages better apparent from the following detailed descri )tion in connection witli'the accompanying t rawin s in which-f.-

igure 1 represents an elevation 'of the machine showing a pneumatic tire boing attached to the rim of the wheel, parts being in section; Fig. 2 is an end view of the feed mechanism for the tire-setting roller; Fig. 3 is a top plan of the machine; Fig. 4 is an enlarged cross-section of the tire and. a side view of the setting roller in operative position; Fig. 5 is al diagrammatic plan showing the relation of tlie plane of rotation of the, roller to the tangent to they arc of its sweep about the eriphery of the wheel rim; Fig. 6 is an en arged side view of 'the arm carthe tire-setting roller, with Aroller of the parts shown in Fig. 6.

Referring to the drawings,l 1 represents a suitable hollow standard terminating at the to in a reduced cylindrical extension or spindle 2 offset from the lower portion and forming therewith an annular ledge or shoulder s. The spindle 2 terminates at the top in an inner flange 3 to which. is bolted or otherwise secured the wheel-supporting ring o-r spider 4f, formed with a. series of radiating arms, two of which are provided with bosses 5 for the support of the screwbolts 6, said bolts passing between the spokes 7 of the vehicle wheel, the felly 8 of which carries the usual metal rim 9 as well understood in the art. VThe bolts 6 extend above the plane of the wheel and have passed over their upper portions a clamping bar 10 which is forced firmly against the hub H of the wheel by thed nuts 11 preferably provided with operating handles 12 as shown. Two bolts located diametrically opposite one another are suflicient to hold the wheel to the spider or rino- 4. The rim of the spider is formed witi a suitable annular groove h for receiving one of the rounded sides b of the rim,` 9, this arrangement preventing any possible horizontal shifting of the wheel when once clamped to the ring (Figs. 1, 4).

Resting on the annular shoulder s and freely revoluble about the spindle 2, and confined between said shoulder and the spider or ring 4, is the hub 13 of an upwardly bent sweep arm 14, the horizontal basal portion of the arm extending radially a. suitable distance beyond the. easing T of the-tire to be set, and the vertical portion ofthe ariri projecting a suitable. distance above the horizontal plane of the wheel when resting on the ring 4. At the bend, the arm 14' is provided with av handle 15 as shown. Projecting horizontally, and radially inyvard from the free or upper end of the ari 14 is a housing 1G of si'ibstantially the crosssection shown in Fig. 2, the said housing being traversed in a horizontal direction by a slide or block 17 suitably guided on the housing (preferably by the tongue and groove fw, zu', shown in Fig. 2), said block being actuated by a horizontal feed screw 18 mounted on the arm 14 and traversing the housing 16. The block17 is-in turn provided. with vertical guide-ways or grooves formedv by the plates 19, 19, for guiding the vertically rer-ipromible feed-block 20, from the lower end of which extends an arm '21 inclined sufficiently to bring its free end vertically below the feed. screw 18 or Vereov tically in line with the basal horizontal porof I'the roller intersectng'the plane of its gent to the arc or circle described in such revolution, as indicated respectively in Figs. 1 and 4, and in the diagrammatic view F 1g. 5, it being understood that the roller 23 is caused to travel around the rim 9 by the rotary sweep of the arm 14 about the axis of the spindle 2. The block 20 is actuated by the vertical feed-screw 24 mounted on the block 17 as clearly indicated in the drawings.

with a hand-wheel W) the roller 23 maybe adjusted to bring its edge e into engagement with the groove c, formed between the bead d and the outer walls of the main body of the tire casing as indicated in Fig. 4.

In the operation of the machine, the lower bead d of the tire casing is first inserted behind the. lower lip a of the rim 9, thereby leavin the upper bead loose around the outside o? the upper lip fn, of the rim. Thereupon the operator manipulates the feedscrews 18 and A24 so as to bring the lower portion of the edge e of the roller 23 into the groove c between the bead d and body of the casing T of the tire, the roller being fed downward sufficiently to force the outer edge of the bead d below the edge of the u pper lip n (Fig. 4), the remaining portlons of the bead being still von the outside contact with the roller of the lip and above the free edge thereof (Fig. 4). By now giving the arm 14 a sing e revolutlon about the axis of the spindle 2, the edge e of the roller will traverse the groove c through an arc of three-hundred and sixty (2,360) degrees, every portion of the bead successively engagedv by the roller in its travel around the tire 'being forced under the edge of the upper lip n (Fig. 4). As the roller leaves the portlons thus successively depressedbelow the edge of the lip, these p'ortions being no longer in will' recover and automatically sprlng back behind the lip n as shown by the dotted lines in Fig. 4, the entire bead d springing into position behind thelip with a single revolution or sweep of the arm 14. The roller 23 it will be observed is bell-shaped, the outer walls being concave and the rotation axis of the ro ler being inclined to the plane of its revolution or sweep around the periphery of the tire. In this revolution the concave periph eral surfaces of the roller will depress the upper walls of the' casing of the tire (assuming that the tire is of the pneumatic variety) as shown in Fig. 4, the. upper bead d being brought just below the edge of the upper ip n. Itvwas pointed out above that the rotation plane of the roller 23 intersects its sweep plane along a lineinclined to the tangent to the circle described in its sweep movement. This is due to the fact that the rotation axis of the roller is inclined By the proper manipulation of the feedscrews 18 and 24 (each being provided R not onl to the plane ofthe rollers revolution (a out the axisof the spindle 2),-'but to the radius of the circle described in such revolution. Thus, sent the lradius of the arc or circle C described by the roller in its revolution about the axis of the spindle 2, and 1" the rotation axis of the roller. The axis rwhile inclined (vertically) to the (horizontal) plane of revolution of the roller (Figs. 1, 4,) is likewise inclined (horizontally) to the radius Assuming that t ltangent to .the circle C, then the line m which represents the line of intersection of the planes-of the rollers rotation and revolution, will make with the tangent t an angle o, which is equal to the angle (1."between the lines and r. To set the tire the sweep arm 14 must revolve counter-clockwise as indicated by the arrow in Fig. 5, or away from the vertex of the -angle a. On the other hand, a tire once set may be released or forced from the rim by giving the arm 14 a sweep in the opposite direction (clockwise), the edge e of the roller in such reverse sweep forcing the upper bead d of the tire casing out'from behind the upper lip n of the rim. These setting and releasing actions of the roller are due to the two distinct inclinations of its rotation axis as previously described, whereby there is imparted to the roller a rotation in a plane intersecting the sweep plane along a line inclined to the tangent to the circle described in the sweep movement; and since this rotation plane makes an obtuse angle with the revolution plane (Figs. l, 4,) on the side vfacing the axis of revolution, causing the edge e ofthe roller to nose under the edge of the lip a, it is apparent from the drawings that this nosing with a sweep of the roller in one direction will tend to work the bead d behind the lip n, and with a sweep in the opposite direction will tend to force it out from behind the lip. In the present embodiment of the invention the sweep arm 14 revolves about the tire and its supporting ring or spider which are stationary, but it would come within the spirit of my invention were the sweep arm and its roller stationary, and the wheel with its tire rotated, the result being the same, since the principle involved is the relative circular movement of the two members to one another, it being immaterial which one actually moves and which remains stationary. The machine is adapted for setting any compressible tire be lthe same pneumatic or solid, so long as it has side bead formations for passing behind the lips n, of the rim. It is obvious of course that the machine may be changed in detail without involving a'departure from the nature or spirit of the invention. Features shown but not alluded to fall within the" (Fig. 5) represents the.

1n Fig. 5, let R reprepurview of the skilled mechanic and a delarc of the circular traverse of the roller.

y 2. In a tire-setting machine, a suitable support for a wheel rim and its tire, a sweep arm revolving about the axis of the rim l -while supported, a roller on the sweep arm rotating about an axis inclined to the sweep plane of the arm, and in a'plane along a line disposed at an angle to the tangent to the circular arc of travel of the svveep arm, the v 'under surface of said roller being' dished to permit the roller to more closely approach the base of the rim for inserting the tire in the rim.

3. In a tire-setting machine, a suitable support for a Wheel rim and its tire, a sweep arm revolving about the axis of the rim While supported, a roller on the sweep arm rotating about an axis inclined to the sweep plane of the arm, and in a plane along a line disposed at an angle to the tangent to the circular arc of travel of the sweep arm, the outer surface of said roller being concave, and thel inner surface dished,`said surfaces terminating in an annular edge for engaging n the tire in positioning the latter in the rim.

In testimony whereof I aix my signature,

in presence of two witnesses.

THOMAS KRAUSKA. Witnesses:

EMIL STAREK, Jos. A. MICHEL. 

